The ball on top of a flagpole is called a 'truck'.
24
Any modern jet is capable of breaking the sound barrier.
34
Students at MIT developed a wristband that can regulate your “thermal comfort”, which could possibly eliminate the need for central heating and cooling.
17
More steel in the United States is used to make bottle caps than to manufacture automobile bodies.
55
There are only 14 blimps in the world.
69
There’s an internet-enabled jacket which gives you a “hug” every time a Facebook friend likes your status.
12
A small airplane can fly backwards.
75
Whale oil was used in automobile transmissions as late as 1973.
56